Abrading-machine.



L HALTERBECK.

ABRADING MACHINE. APPLICATION FILED SEPT. 4. |912.V RENEWED JUNE 8, i916.

1,212,211 3. Patented Jan. 16,1917.

2 SHEETS-SHEET l.

J. HALTERBECK.

'ABR/mme MACHINE.

APPLICATION FILED SEPT. 4, 1-912. RENEWED JUNE 8.1916.

1,212,213. Patentea Jan. 16,1917.

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JOHN HALTERBECK, OF NE YORK, N. Y., ASSIGNOR TO GOTTFRIED PIEL, OIFv NEW YORK, N. Y.

ABRADINGr-MACHIN E.

Specification of Letters Patent.

Patented Jan. 16, 1917.

Application filed September 4, 1912, Serial No. 718,546. Renewed .Tune 8, 1916. Serial No. 102,602.

To all fao/wm t may concern Be it known that I, JOHN HALTERBEGK, a subject of the Emperor of Germany, and a resident of New York city, borough of Bronx, in the county of N ew York and State of New York, have invented certain new and useful Improvements in Abrading-Ma chines, of which the following is a specification.

This invention relates to abrading machines, more particularly to machines in which the abrading member consists of an endless traveling belt of emery cloth, sand paper or the like.

The principal object of this invention is to provide in an abrading machine of this character, lguiding and supportingv means for the work whereby curved surfaces of any given radius of curvature may` be cut, ground or nished to any desired depth.

Another object of this invention is to provide guiding and supporting. means for the work whereby conical as well as cylindrical surfaces of any desired curvature and depth may be cut.

A further object is to provide in a machine of this character, means whereby both flat and curved surfaces of any degree of curvature may be cut.

A still further object is to provide in a machine of this character, means for automatically withdrawing' the dust caused by the abrasion of the material.

The various other objects will appear from the detailed description and will be particularly pointed out in the claims.

In carrying out my invention, I mount a guide plate on either side of the small roller, one of which plates is adjustable so as to form a varying angle with the other plate. `When it is desired to cut, grind or finish a curved surface on a piece of material, the edges Vof the surfaces are guided on the guide plates and the portion of the work between these edges is hollowed to a depth depending upon the degree of angularity of the guide plates with respect to each other. The table for holding the work is also tiltable to permit the grinding of a conical surface of any desired curvature and depth. For grinding upon the same band, dat surfaces and likewise surfaces requiring irregular or shallow curvature, two additional tiltable tables are provided, one adjacent a stationary support situated behind the emery cloth and the other adjacent the drum by which the emery cloth is driven. To'avoid the accumulation of dust, a brush is applied to the emery cloth and an exhaust flue is disposed adjacent thereto for drawing away the dust dislodged by the brush.

In the accompanying drawings :--Figure 1 is a plan of my invention, the work being illustrated in dot and dash lines to indicate how it is guided while having a cylindrical surface cut therein. Fig. 2 is an elevation of the machine, the dot and dash lines adjacent the small roller indicate the position of the table and work when set to cut a conical surface. Figs. 3 and t are diagrams illustrating the eect of varying the angle between the guide plates.

Power is transmitted from any convenient source through a belt 1, passing under idler pulleys 2 to a drive pulley 3 connected to a drum 4C over which passes an endless band of emery cloth or sand paper 5. The latter passes over roller 6, driven from the drum shaft throughsuitable gearing 7 and 8, and then passes under the tightening roll 9 and around the small roll 10 and roll 11 and returns to the drum 4. The tightening roll is adjusted in any suitable manner as by a hand wheel 9a clamping a slotted lug 9b extending from a pivoted arm 9c on which the roller 9 is mounted;V

Adjacent to the roll 10 is mounted a tilt= able table 12 pivotally mounted on a stand 13 fixed to the frame work. Table 12 has wings 1a and 15 extending on either side of the roller, and between these wings and the runs of the belt of emery, cloth or sand paper are mounted preferably vertical plates 16 and 17. Plate 16 is stationary while plate 17 is adjustable so as to vary the angle formed between it and plate 16. The adjusting means for plate 17 consists preferably of an arcuate segment 18 projecting from the plate having an arcuate slot 19 through which passes a studbolt 20 projectingfrom vstandard 21. The segment may be clamped to the standard in adjusted position by a suitable thumb nut 22 on the stud.

The work 23 indicated in dot and dash lines in Fig. 1, engages the plates 16 and 17 at two points 24 which determine the radius of curvature of the curved surface. When it is desired to increase the depth of the hollowed out portion with a given radius of curvature the angle between plates 16 and 17 is decreased. Referring to the diagram in Fig. 3, line `ca-b is the chord of the arc a-c-b the altitude of which is c-cl. lVhen the difference between the grinding points is increased to w--3/, the altitude c-z of the arc m-c-y has the same proportion to the chord aJ-g/ as the altitude b-c 'has to the chord zr-. The relative depth of the hollow or depression remains unchanged. ln Fig. fl theangle between plates 16 and 17 is decreased and the distance between points atl-1 has been kept the same as the distance a-Z) in Fig. 3. It will be noted that with the same length of chord the altitude ofl are c1 c1 b1 is considerably greater than altitude c-d in Fig. 3. rllhe relative portion of are with reference to the circumference of the circle has been increased, thus producing a steeper depression or hollowed out portion in the work than is produced with the adjustment of plates 1G and 17 in Fig. 3.

To abradeor grind a flat surface, a tiltable table 25 is provided adjacent the run ofthe belt of emery cloth between drum t and roll 11. Behind this run of belt a fiat y vertical stationaryplate 26 is provided to maintain the emerycloth flat while the work is pressed against it. For abrading surface of irregular or shallow curvature a tiltable table 27 is provided' adjacent drum 4.

For removing or disposing of the dust produced by the abrasion of the work a brush 28 is preferably mounted at a convenient point to bear against the emery cloth.

This brush may be mounted on plate 16 and adjacent to the same a flue 29 may be provided through which the dust may be sucked by an exhaust fan or vacuum cleaning device or any other suitable means. The guide i plates 16 and 17 act also as dust guards and coperate with the exhausting device to keep the dust away from the operator.

It will thus bek clear that with the conf struction above described a cylindrical or conical surface of any desired radius of curvature or depth may be cut or ground on the work. When it is desired to make a deeper cut of the same radius of curvature the adjustable guide plate is adjusted to reduce the angle between it and the stationary plate, whereas, if it is desired to increase the radius of curvature without changing the `depth of cut the adjustable plate is ad justed to increase the angle between it and the stationary plate and at the same time the distance betweenthe guidingpoints on the work is increased. It will also be noted that by the above described machine fiat surfaces and surfaces of irregular or shallow or con- Vex curvature may be also cut on the same band which is used for cutting the cylindrical or conical surfaces. Thus a variety of shapes and forms may be finished on the same machine, avoiding the necessity of taking one object to several machines if it has several differently shaped surfaces.

Various changes may be resorted to within the skill of the mechanic without departing from the spirit and scope of the invenien as defined in the claims.

Having thus described my invention, l claim l. ln an abrading machine for concave surfaces, an abrading member for engaging the concave surface as the member and surface are moved relatively, a rigid guide placed on either side thereof at an angle to each other for engaging edges of the surface during the relative movement, said guides being spaced away from the path of the concave surface, means for adjusting the angle between the guides, and means for supporting the work to be held in engagement with the guides and the abrading member.

2. ln an abrading machine for concave surfaces, an abrading member comprising a traveling belt for engaging the surface as the belt and surface are moved relatively, a guide having a flat bearing surface placed on either side thereof at an angle to eachother for engaging edges of the surface during the relative movement, said guides being spaced away from the path of the concave surface, means for adjusting the angle between the guides, and means for support ing the work to be held in engagement with the flat bearing surfaces of the guides and the abrading member.

3. ln an abrading machine for concave surfaces, an abrading member for engaging the concave surface as the member and surface are moved relatively, a guide placed on either side thereof at an angle to each other for engaging edges of the surface during the relative movement, said guides being spaced away from 'the path of the concave surface, means for adjusting the angle between the guides, and a tiltable table for supporting the work to be held in engagement with the guides and the abrading member.

4. In an abrading machine for concave surfaces, an abrading member comprising a traveling belt for engaging the surface as the belt and surface are moved relatively, a guide placed on either side thereof at an angle to each other for engaging edges of the surface during the relative movement, said guides being spaced away from the path of the concave surface, means for adjusting the angle between the guides, and a tiltable table for supporting the work to be held in engagement with the guides and the abrading member.

5. In an abrading machine for concave surfaces, a vertical roll, an abrading band passing thereover for engaging the concave surface as the surface and band are moved relatively, a pair of vertical guide plates on either side of the roll, placed at an angle to each other for engaging edges of the surface during the relative movement, said guide plates being spaced away from the path of the concave surface, means for adjusting the angle of the guide plates, and a table mounted adjacent said plates adapted to support the work against said roll and guide plates, the angle between the table and the guide plates being free of obstruction whereby work of any size or shape may be disposed in said angle.

6. In an abrading machine for concave surfaces, a vertical roll, an abrading band passing thereover for engaging the concave surface as the surface and band are moved relatively, a pair of vertical guide plates one on either side of the roll, placed at an angle to each other for engaging edges of the surface during the relative movement, said guide plates being spaced away from the path of the concave surface, means for adjusting the angle of the guide plates, and a table mounted adjacent said plates adapted to support the work against said roll and guide plates, said table having wings eX- tending closely adjacent to said guide plates.

In an abrading machine for concave surfaces, a roll, an abrading member passing thereover for engaging the concave surface as the member and surface are moved relatively, a pair of guide plates for the work mounted one on each side of the roll for engaging edges of the surface during the relative movement, said guide plates being spaced away from the path of the concave surface, a brush on one of said plates engaging the abrading member, and a table adjacent the guide plates, said guides constituting also dust shields.

8. In an abrading machine for concave surfaces, a vertical roll, an abrading band passing thereover for engaging the concave surface as the surface and band are moved relatively, a pair of vertical guide plates one on either side of the roll for engaging edges of the surface during the relative movement, said guide plates being spaced away from the path of the concave surface, placed at an angle to each other, means for adjusting the angle of one of the guide plates, said adjusting means comprising a segment attached to one of the plates, and means for clamping the segment to a stationary part of the frame.

9. 11i an abrading machine for concave surfaces, a vertical roll, an abrading band passing thereover for engaging the concave surface as the surface and band are moved relatively, a pair of vertical guide plates one on either side of the roll, placed at an angle to each other for engaging edges of the surface during the relative movement, said guide plates being spaced away from the path of the concave surface, means for adjusting the angle of one of the guide plates, said adjusting means comprising a slotted arcuate segment attached to one of the plates, a stationary stud extending through said slot, and means for clamping the segment to the stud.

10. in a machine for abrading concave surfaces, an abrading member having a surface adapted to enter the concavity and to engage the surface thereof as the member and concave surface are moved relatively, and a guide for engaging an edge of the concave surface during the said relative movement, said guide being spaced Vfrom the path of the concave surface, the portion of the guide engaging said edges being immovable relative to each other.

11. In a machine'for abrading concave surfaces, an abrading member adapted to enter the concavity and to engage the surface thereof as the member and surface are moved relatively, and guides one at each side of the member for engaging edges of the surface during the relative movement, said guides being spaced from the path of the concave surface and each having a substantially straight bearing surface.

12. In a machine for abrading concave surfaces, an abrading member adapted to enter the concavity and to engage the surface thereof as the member and surface are moved relatively, and a guide for engaging an edge of the surface during the relative movement said guide being spaced from the path of the concave surface, and adjusting means for revolving said guide about a point eXteriorly of the same to change the direction of the guide.

13. In a machine for abrading concave surfaces, an abrading member adapted to enter the concavity and to engage the surface thereof as the member and surface are moved relatively, guides one at each side of the member for engaging edges of the surface during the relative movement, said guides being spaced from the path of the concave surface, and adjusting means for changing the angle between the guides, the apex of said angle being a fixed point positioned between the members.

Signed at New York city, in the county of New York and State of New York, this 30th day of August, 1912.

JOHN HALTERBECK.

Witnesses:

FLORENCE MANUEL, SARA A. THORNTON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

Yioo 

